from flask import current_app, jsonify
from flask import g
from flask import request
from flask import session

from info import db
from info.models import News, User, Comment, CommentLike
from info.utils.commons import user_login_data
from info.utils.response_code import RET
from . import news_blue
from flask import render_template, abort

# *********************# 关注&取消关注***********
@news_blue.route("/followed_user", methods = ["POST"])
@user_login_data
def folloewd_user():
    # 判断用户是否登陆
    if not g.user:
        return jsonify(errno = RET.NODATA, errmsg ="该用户未登陆")
    # 获取参数
    author_id = request.json.get("user_id")
    action = request.json.get("action")
    # 校验参数，为空校验
    if not all([author_id,action]):
        return jsonify(errno = RET.PARAMERR, errmsg = "参数不全")
    # 操作类型校验
    if not action in ["follow", "unfollow"]:
        return jsonify(errno = RET.DATAERR, errmsg = "操作类型有误")
    # 根据作者编号取出作者对象，判断作者对象是否存在
    try:
        author = User.query.get(author_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno = RET.DBERR, errmsg = "获取用户失败")
    if not author: return jsonify(errno = RET.NODATA, errmsg = "该作者不存在")
    # 很据操作类型判段 关注 &  取消关注
    try:
        if action == "follow":
            # 判断是否有关注过该作者
            if not g.user in author.followers:
                author.followers.append(g.user)
        else:
            if  g.user in author.followers:
                author.followers.remove(g.user)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno = RET.DBERR, errmsg = "操作失败")

    # 返回响应
    return jsonify(errno = RET.OK, errmsg = "操作成功")
# **********************点赞&取消点赞************
@news_blue.route('/comment_like', methods=['POST'])
@user_login_data
def comment_like():
    """
    - 0.判断用户是否登陆
    - 1.获取参数
    - 2.校验参数,为空校验
    - 3.操作类型校验
    - 4.根据评论编号获取评论对象,判断是否存在
    - 5.根据操作类型,点赞&取消点赞操作
    - 6.返回响应
    :return:
    """
    # - 0.判断用户是否登陆
    if not g.user:
        return jsonify(errno=RET.NODATA,errmsg="用户未登录")

    # - 1.获取参数
    comment_id = request.json.get("comment_id")
    action = request.json.get("action")

    # - 2.校验参数,为空校验
    if not all([comment_id,action]):
        return jsonify(errno=RET.PARAMERR,errmsg="参数不全")

    # - 3.操作类型校验
    if not action in ["add","remove"]:
        return jsonify(errno=RET.DATAERR,errmsg="操作类型有误")

    # - 4.根据评论编号获取评论对象,判断是否存在
    try:
        comment = Comment.query.get(comment_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR,errmsg="获取评论失败")

    if not comment: return jsonify(errno=RET.NODATA,errmsg="评论不存在")

    # - 5.根据操作类型,点赞&取消点赞操作
    try:
        if action == "add":
            #判断当前用户是否,对该评论点过赞
            comment_like = CommentLike.query.filter(CommentLike.user_id == g.user.id, CommentLike.comment_id == comment_id).first()
            if not comment_like:
                #创建点赞对象
                comment_like = CommentLike()
                comment_like.comment_id = comment_id
                comment_like.user_id = g.user.id

                #添加到数据库
                db.session.add(comment_like)

                #将点赞数量+1
                comment.like_count += 1

                db.session.commit()
        else:
            # 判断当前用户是否,对该评论点过赞
            comment_like = CommentLike.query.filter(CommentLike.user_id == g.user.id, CommentLike.comment_id == comment_id).first()
            if comment_like:
                # 移除点赞对象
                db.session.delete(comment_like)

                # 将点赞数量-1
                if comment.like_count > 0:
                    comment.like_count -= 1

                db.session.commit()
    except Exception as e:
        current_app.logger.error(e)
        db.session.rollback()
        return jsonify(errno=RET.DBERR,errmsg="操作失败")

    # - 6.返回响应
    return jsonify(errno=RET.OK,errmsg="操作成功")


# **************评论&回复评论************
@news_blue.route("/news_comment", methods = ["POST"])
@user_login_data
def news_comment():
    # 判断用户是否登陆
    if not g.user:
        return jsonify(errno = RET.NODATA, errmsg = "用户未登录")
    # 获取参数
    news_id = request.json.get("news_id")
    content = request.json.get("comment")
    parent_id = request.json.get("parent_id")
    # 校验参数，为空校验
    if not all([news_id, content]):
        return jsonify(errno = RET.PARAMERR, errmsg = "参数不全")
    # 创建评论对象 设置属性
    comment = Comment()
    comment.user_id = g.user.id
    comment.news_id = news_id
    comment.content = content
    # 判断是否有父评论编号
    if parent_id:
        comment.parent_id = parent_id
    # 奖评论添加到数据库
    try:
        db.session.add(comment)
        db.session.commit()
    except Exception as e:
        current_app.logger.error(e)
        db.session.rollback()
        return jsonify(errno = RET.DBERR, errmsg = "评论失败")
    # 返回响应，携带评论数据
    return jsonify(errno = RET.OK, errmsg = "评论成功", data = comment.to_dict())

# **************点赞&取消点赞************
@news_blue.route("/news_collect", methods = ["POST"])
@user_login_data
def news_collect():
    # 判断用户是否登陆
    if not g.user:
        return jsonify(errno = RET.NODATA,errmsg = "用户未登录")
    # 获取参数
    news_id = request.json.get("news_id")
    action = request.json.get("action")
    # 校验参数为空校验
    if not all([news_id, action]):
        return jsonify(errno = RET.PARAMERR, errmsg = "参数不全")
    # 操作类型校验
    if not action in ["collect", "cancel_collect"]:
        return jsonify(errno = RET.DATAERR, errmsg = "操作类型有误")
    # 根据新闻编号取出新闻对象
    try:
        news = News.query.get(news_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno = RET.DBERR,errmsg = "获取新闻失败")
    # 判断新闻对象是否存在
    if not news:
        return jsonify(errno = RET.NODATA, errmsg = "新闻不存在")
    try:
        # 根据操作类型收藏&取消
        if action == "collect":
            # 判断用户已经对该新闻收藏了
            if not news in g.user.collection_news:
                g.user.collection_news.append(news)
        else:
            if not news in g.user.collection_news:
                g.user.collection_news.remove(news)

    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno = RET.DBERR,errmsg = "操作失败")
    # 返回响应
    return jsonify(errno = RET.OK, errmsg = "操作成功")


# ***********新闻详情********
@news_blue.route('/<int:news_id>')
@user_login_data
def news_detail(news_id):
    # # 获取用户登陆状态
    # user_id = session.get("user_id")
    #
    # # 获取用户登陆数据
    # user = None
    # if user_id:
    #     try:
    #         user = User.query.get(user_id)
    #     except Exception as e:
    #         current_app.logger.error(e)
    # # 根据新闻编号取出新闻对象
    try:
        news = News.query.get(news_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno = RET.DBERR,errmsg = "新闻获取失败")
    # 判断新闻是否存在
    if not news:
        abort(404)
    # 查询热门新闻的前五条
    try:
        new_list = News.query.order_by(News.clicks.desc()).limit(5).all()
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno = RET.DBERR,errmsg = "获取新闻失败")
    # 奖新闻转成字典列表
    click_news_list = []
    for click_news in new_list:
        click_news_list.append(click_news.to_dict())
    # 处理登录用户是否对该用户收藏过
    is_collection = False
    if g.user and news in g.user.collection_news:
        is_collection = True
    # 查询该新闻所有的评论
    try:
        comments = Comment.query.filter(Comment.news_id == news_id).order_by(Comment.create_time.desc()).all()
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg="获取评论失败")
    # *************** 用户点赞过的评论编号容器**********
    # **********************************************
    like_comment_ids = []
    if g.user:
        try:
            # 获取用户点过赞的评论编号
            comment_likes = CommentLike.query.filter(CommentLike.user_id == g.user.id).all()
        except Exception as e:
            current_app.logger.error(e)
            # 遍历获取用户点过赞的评论编号

        for comment_like in comment_likes:
            like_comment_ids.append(comment_like.comment_id)
            #     将屏论对象列表,转化成字典列表
        comment_list = []
        for comment in comments:
            comment_dict = comment.to_dict()
                # 设：用户对所有的评论都没点过赞
            comment_dict["is_like"] = False
            if g.user and comment.id in like_comment_ids:
                comment_dict["is_like"] = True

            comment_list.append(comment_dict)
        # 判断用户是否关注过作者
    is_followed = False
    if g.user and news.user:
        if g.user in news.user.followers:
            is_followed = True
    # 携带新闻数据渲染页面
    data = {
        "news_info":news.to_dict(),
        "user_info":g.user.to_dict() if g.user else "",
        "click_news_list":click_news_list,
        "is_collection": is_collection,
        "comments": comment_list,
        "is_followed": is_followed

    }
    return render_template("news/detail.html",data = data)